Marvel has just revealed that one of their classic comic book characters is not only set to make an appearance to "Marvel's Agents of S.H.I.E.L.D.", but that he's actually been a part of the show since the very first episode. J. August Richards' Mike Peterson will, in the February 4th episode, become the cybernetic soldier Deathlok!

Deathlok, Marvel's cyborg assassin, celebrates his 40th anniversary this year. Formerly considered for a big screen film, Deathlok's role on "S.H.I.E.L.D." is officially described as follows:

Transformed into the cybernetic solider against his will, Mike Peterson must struggle to find the man in the machine. With a high-tech eye that allows him to see through walls, super strength and increased speed courtesy of a cybernetic leg, will Deathlok fight alongside the Agents of S.H.I.E.L.D. or against them?

"We have been waiting all season for this moment where we can reveal that Mike Peterson's story arc is an origin story," said Executive Producer Jeffrey Bell. "We're thrilled to have J. August Richards playing Deathlok and to have our audience enjoy this favorite Marvel character on the show."

"If you would have asked when I was nine years old what I wanted to be, I would have said a super hero and I'm so excited to be one now as an adult on TV!" added J. August Richards. "It's a dream come true."

Titled "T.R.A.C.K.S.", the February 4th episode is the series' 13th overall. The 15th episode, meanwhile, was previously announced to feature Jaimie Alexander reprising her Thor and Thor: The Dark World role as Lady Sif.

"Sif will come to Earth to track down Lorelei, a villain from Walter Simonson's Thor run," reads an official Tweet update from Marvel's TCA presentation. Elena Satine ("Magic City") will play the Asgardian foe.